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Triple therapy containing lansoprazole 30 mg once daily, AM 500 mg and CM 250 mg twice daily for two weeks is a promising regimen which reaches a high eradication rate, avoids MZ resistance, and has very good patient compliance at an acceptable cost [7].

CONCLUSIONS: These results suggest that the hydroxylation of lansoprazole cosegregates with the genetically determined S-mephenytoin 4'-hydroxylation (CYP2C19) polymorphism in the Korean subjects [20].

The amount of blood in the stomach at endoscopy was reduced significantly by both lansoprazole (0.22 (0.07-0.63)) and tranexamic acid (0.27 (0.09-0.81)), although there was no evidence of synergy [27].

Antibodies against rat CYP3A enzymes inhibited the rate of both 5-hydroxylation (approximately 55%) and sulfoxidation (approximately 70%) and cDNA-expressed CYP3A4 catalyzed both the 5-hydroxylation and sulfoxidation of lansoprazole (apparent Km approximately 100 microM) [30].

The cDNA expressed enzymes CYP2C8, CYP2C9 and CYP2C19 catalyzed varying rates of lansoprazole 5-hydroxylation at a substrate concentration of 50 microM, but only CYPC19 catalyzed this reaction at 1 microM [30].